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1.1 parser 1: /** @file
2: Parser Oracle driver.
3:
4: Copyright(c) 2001 ArtLebedev Group(http://www.artlebedev.com)
5:
6: Author: Alexander Petrosyan <paf@design.ru>(http://design.ru/paf)
7:
1.11 parser 8: 2001.07.30 using Oracle 8.1.6 [@test tested with Oracle 7.x.x]
1.1 parser 9: */
1.14 ! parser 10: static const char *RCSId="$Id: parser3oracle.C,v 1.13 2001/08/24 09:14:32 parser Exp $";
1.1 parser 11:
12: #include "config_includes.h"
13:
14: #include "pa_sql_driver.h"
15:
16: #include <oci.h>
17:
18: #define MAX_COLS 500
19: #define MAX_IN_LOBS 5
20: #define MAX_LOB_NAME_LENGTH 100
21: #define MAX_OUT_STRING_LENGTH 4000
22:
23: #define EMPTY_CLOB_FUNC_CALL "empty_clob()"
24:
25: #include "ltdl.h"
26:
27: #define MAX_STRING 0x400
28: #define MAX_NUMBER 20
29:
30: #if _MSC_VER
31: # define snprintf _snprintf
32: # define strcasecmp _stricmp
33: # define strncasecmp _strnicmp
34: #endif
35:
36: #ifndef max
37: inline int max(int a, int b) { return a>b?a:b; }
38: inline int min(int a, int b){ return a<b?a:b; }
39: #endif
40:
41: static char *lsplit(char *string, char delim) {
42: if(string) {
43: char *v=strchr(string, delim);
44: if(v) {
45: *v=0;
46: return v+1;
47: }
48: }
49: return 0;
50: }
51:
52: struct OracleSQL_connection_struct {
53: jmp_buf mark; char error[MAX_STRING];
54: OCIEnv *envhp;
55: OCIServer *srvhp;
56: OCIError *errhp;
57: OCISvcCtx *svchp;
58: OCISession *usrhp;
59: };
60:
61: struct OracleSQL_query_lobs {
62: struct return_rows {
63: struct return_row {
64: OCILobLocator *locator; ub4 len;
65: int ind;
66: ub2 rcode;
67: } *row;
68: int count;
69: };
70: struct cbf_context_struct {
71: SQL_Driver_services *services;
72: OracleSQL_connection_struct *cs;
73: return_rows *rows;
74: };
75: struct Item {
76: const char *name_ptr; size_t name_size;
77: char *data_ptr; size_t data_size;
78: OCILobLocator *locator;
79: OCIBind *bind;
80: return_rows rows;
81: } items[MAX_IN_LOBS];
82: int count;
83: };
84:
85:
86: // forwards
87: void check(
88: SQL_Driver_services& services, OracleSQL_connection_struct &cs,
89: const char *step, sword status);
90: static sb4 cbf_no_data(
91: dvoid *ctxp,
92: OCIBind *bindp,
93: ub4 iter, ub4 index,
94: dvoid **bufpp,
95: ub4 *alenpp,
96: ub1 *piecep,
97: dvoid **indpp);
98: static sb4 cbf_get_data(dvoid *ctxp,
99: OCIBind *bindp,
100: ub4 iter, ub4 index,
101: dvoid **bufpp,
102: ub4 **alenp,
103: ub1 *piecep,
104: dvoid **indpp,
105: ub2 **rcodepp);
1.3 parser 106: void tolower(char *out, const char *in, size_t size);
1.1 parser 107:
108: /**
109: OracleSQL server driver
110: */
111: class OracleSQL_Driver : public SQL_Driver {
112: public:
113:
114: OracleSQL_Driver() : SQL_Driver() {
115: }
116:
117: /// get api version
118: int api_version() { return SQL_DRIVER_API_VERSION; }
119: /// initialize driver by loading sql dynamic link library
1.14 ! parser 120: const char *initialize(const char *dlopen_file_spec) {
1.6 parser 121: const char *error=dlopen_file_spec?
1.1 parser 122: dlink(dlopen_file_spec):"client library column is empty";
1.14 ! parser 123: if(!error) {
! 124: // error="OCIInitialize replacer";/*
1.4 parser 125: OCIInitialize((ub4)OCI_THREADED, (dvoid *)0,
1.5 parser 126: (dvoid * (*)(void *, unsigned int))0,
127: (dvoid * (*)(void*, void*, unsigned int))0,
1.14 ! parser 128: (void (*)(void*, void*))0 );
! 129: // */
1.6 parser 130: }
1.1 parser 131:
1.6 parser 132: return error;
1.1 parser 133: }
134:
135: /** connect
136: @param used_only_in_connect_url
1.2 parser 137: format: @b user:pass@service
1.1 parser 138: */
139: void connect(
140: char *used_only_in_connect_url,
141: SQL_Driver_services& services,
142: void **connection ///< output: OracleSQL_connection_struct *
143: ) {
1.11 parser 144: // connections are cross-request, do not use services._alloc [linked with request]
145: OracleSQL_connection_struct &cs=
146: *(OracleSQL_connection_struct *)::calloc(sizeof(OracleSQL_connection_struct), 1);
147:
1.1 parser 148: char *user=used_only_in_connect_url;
149: char *service=lsplit(user, '@');
150: char *pwd=lsplit(user, ':');
151:
1.2 parser 152: if(!(user && pwd && service))
1.3 parser 153: services._throw("mailformed connect part, must be 'user:pass@service'");
1.2 parser 154:
1.1 parser 155: if(setjmp(cs.mark))
156: services._throw(cs.error);
157:
1.3 parser 158: // Allocate and initialize OCIError handle, attempt #1
159: /*
160: grabbed from sample
161: /server.804/a58234/oci_func.htm#446192
162: but doc
163: /server.804/a58234/oci_func.htm#446100
164: doesnt have this param listed as allowed
165: 8.1.6 client library barks as OCI_INVALID_HANDLE
166: and debugging revealed that OCI_HTYPE_ENV param value is invalid
167: later in doc
168: /server.804/a58234/oci_func.htm#446192
169: on OCIEnvInit thay say
170: "No changes are done to an already initialized handle"
171: think, this is some sort of backward compatibility wonder.
172: leaving as it is, and without check()
173: */
1.10 parser 174: OCIHandleAlloc((dvoid *)NULL, (dvoid **) &cs.envhp, (ub4)OCI_HTYPE_ENV, 0, 0);
1.3 parser 175: // Initialize an environment handle, attempt #2
1.4 parser 176: check(services, cs, "EnvInit", OCIEnvInit(
1.3 parser 177: &cs.envhp, (ub4)OCI_DEFAULT, 0, 0));
178: // Allocate and initialize OCIError handle
1.4 parser 179: check(services, cs, "HandleAlloc errhp", OCIHandleAlloc(
1.3 parser 180: (dvoid *)cs.envhp, (dvoid **) &cs.errhp, (ub4)OCI_HTYPE_ERROR, 0, 0));
181: // Allocate and initialize OCIServer handle
1.4 parser 182: check(services, cs, "HandleAlloc srvhp", OCIHandleAlloc(
1.3 parser 183: (dvoid *)cs.envhp, (dvoid **) &cs.srvhp, (ub4)OCI_HTYPE_SERVER, 0, 0));
184: // Attach to a 'service'; initialize server context handle
1.4 parser 185: check(services, cs, "ServerAttach", OCIServerAttach(
1.10 parser 186: cs.srvhp, cs.errhp, (text *)service, (sb4)strlen(service), (ub4)OCI_DEFAULT));
1.3 parser 187: // Allocate and initialize OCISvcCtx handle
1.4 parser 188: check(services, cs, "HandleAlloc svchp", OCIHandleAlloc(
1.3 parser 189: (dvoid *)cs.envhp, (dvoid **) &cs.svchp, (ub4)OCI_HTYPE_SVCCTX, 0, 0));
190: // set attribute server context in the service context
1.4 parser 191: check(services, cs, "AttrSet server-service", OCIAttrSet(
1.3 parser 192: (dvoid *)cs.svchp, (ub4)OCI_HTYPE_SVCCTX,
1.5 parser 193: (dvoid *)cs.srvhp, (ub4)0,
1.3 parser 194: (ub4)OCI_ATTR_SERVER, (OCIError *)cs.errhp));
195: // allocate a user context handle
1.4 parser 196: check(services, cs, "HandleAlloc usrhp", OCIHandleAlloc(
1.3 parser 197: (dvoid *)cs.envhp, (dvoid **)&cs.usrhp, (ub4)OCI_HTYPE_SESSION, 0, 0));
198: // set 'user' name
1.4 parser 199: check(services, cs, "AttrSet user-session", OCIAttrSet(
1.2 parser 200: (dvoid *)cs.usrhp, (ub4)OCI_HTYPE_SESSION,
1.1 parser 201: (dvoid *)user, (ub4)strlen(user),
1.3 parser 202: OCI_ATTR_USERNAME, cs.errhp));
203: // set 'pwd' password
1.4 parser 204: check(services, cs, "AttrSet pwd-session", OCIAttrSet(
1.2 parser 205: (dvoid *)cs.usrhp, (ub4)OCI_HTYPE_SESSION,
1.1 parser 206: (dvoid *)pwd, (ub4)strlen(pwd),
1.2 parser 207: OCI_ATTR_PASSWORD, cs.errhp));
1.3 parser 208: // Authenticate a user
1.4 parser 209: check(services, cs, "SessionBegin", OCISessionBegin(
1.3 parser 210: cs.svchp, cs.errhp, cs.usrhp,
1.1 parser 211: OCI_CRED_RDBMS, OCI_DEFAULT));
1.3 parser 212: // remember connection in session
1.4 parser 213: check(services, cs, "AttrSet service-session", OCIAttrSet(
1.2 parser 214: (dvoid *)cs.svchp, (ub4)OCI_HTYPE_SVCCTX,
1.1 parser 215: (dvoid *)cs.usrhp, (ub4)0,
1.2 parser 216: OCI_ATTR_SESSION, cs.errhp));
1.1 parser 217:
1.3 parser 218: // return created connection
1.1 parser 219: *(OracleSQL_connection_struct **)connection=&cs;
220: }
1.14 ! parser 221: void disconnect(void *connection) {
! 222: return;
! 223:
1.1 parser 224: OracleSQL_connection_struct &cs=*(OracleSQL_connection_struct *)connection;
1.3 parser 225: // Terminate a user session
1.11 parser 226: OCISessionEnd(
1.12 parser 227: cs.svchp, cs.errhp, cs.usrhp, (ub4)OCI_DEFAULT);
1.3 parser 228: // Detach from a server; uninitialize server context handle
1.11 parser 229: OCIServerDetach(
1.12 parser 230: cs.srvhp, cs.errhp, (ub4)OCI_DEFAULT);
1.11 parser 231: // Free a previously allocated handles
1.14 ! parser 232: /*
! 233: oci will free them up as belonging to env
1.11 parser 234: OCIHandleFree(
1.12 parser 235: (dvoid *)cs.srvhp, (ub4)OCI_HTYPE_SERVER);
1.11 parser 236: OCIHandleFree(
1.12 parser 237: (dvoid *)cs.svchp, (ub4)OCI_HTYPE_SVCCTX);
1.11 parser 238: OCIHandleFree(
1.12 parser 239: (dvoid *)cs.errhp, (ub4)OCI_HTYPE_ERROR);
1.14 ! parser 240: */
1.11 parser 241: OCIHandleFree(
1.12 parser 242: (dvoid *)cs.envhp, (ub4)OCI_HTYPE_ENV);
1.11 parser 243:
244: // connections are cross-request, do not use services._alloc [linked with request]
245: ::free(&cs);
1.1 parser 246: }
247: void commit(SQL_Driver_services& services, void *connection) {
248: OracleSQL_connection_struct &cs=*(OracleSQL_connection_struct *)connection;
1.4 parser 249: if(setjmp(cs.mark))
250: services._throw(cs.error);
1.1 parser 251:
252: check(services, cs, "commit", OCITransCommit(cs.svchp, cs.errhp, 0));
253: }
254: void rollback(SQL_Driver_services& services, void *connection) {
255: OracleSQL_connection_struct &cs=*(OracleSQL_connection_struct *)connection;
1.4 parser 256: if(setjmp(cs.mark))
257: services._throw(cs.error);
1.1 parser 258:
259: check(services, cs, "rollback", OCITransRollback(cs.svchp, cs.errhp, 0));
260: }
261:
262: bool ping(SQL_Driver_services&, void *connection) {
1.4 parser 263: // maybe OCIServerVersion?
264: return true;
1.1 parser 265: }
266:
267: unsigned int quote(
268: SQL_Driver_services&, void *,
269: char *to, const char *from, unsigned int length) {
270: /*
271: it's already UNTAINT_TIMES_BIGGER
272: */
273: unsigned int result=length;
274: while(length--) {
275: switch(*from) {
276: case '\'': // "'" -> "''"
277: *to++='\'';
278: break;
279: case '\\': // "\" -> "\\"
280: *to++='\'';
281: break;
282: }
283: *to++=*from++;
284: }
285: return result;
286: }
287: void query(
288: SQL_Driver_services& services, void *connection,
289: const char *astatement, unsigned long offset, unsigned long limit,
290: SQL_Driver_query_event_handlers& handlers) {
1.10 parser 291:
1.1 parser 292: OracleSQL_connection_struct &cs=*(OracleSQL_connection_struct *)connection;
293: OracleSQL_query_lobs lobs={{0}, 0};
294: OCIStmt *stmthp=0;
295:
296: bool failed=false;
297: if(setjmp(cs.mark)) {
298: failed=true;
299: goto cleanup;
1.7 parser 300: } else {
1.1 parser 301: const char *statement=preprocess_statement(services, cs,
302: astatement, lobs);
303:
1.4 parser 304: check(services, cs, "HandleAlloc STMT", OCIHandleAlloc(
1.3 parser 305: (dvoid *)cs.envhp, (dvoid **) &stmthp, (ub4)OCI_HTYPE_STMT, 0, 0));
1.1 parser 306: check(services, cs, "syntax",
307: OCIStmtPrepare(stmthp, cs.errhp, (unsigned char *)statement,
1.10 parser 308: (ub4)strlen((char *)statement),
1.3 parser 309: (ub4)OCI_NTV_SYNTAX, (ub4)OCI_DEFAULT));
1.1 parser 310: {
311: for(int i=0; i<lobs.count; i++) {
312: check(services, cs, "alloc output var desc", OCIDescriptorAlloc(
1.3 parser 313: (dvoid *)cs.envhp, (dvoid **)&lobs.items[i].locator, (ub4)OCI_DTYPE_LOB, 0, 0));
1.1 parser 314:
315: check(services, cs, "bind output", OCIBindByPos(stmthp,
316: &lobs.items[i].bind, cs.errhp,
1.5 parser 317: (ub4)1+i,
1.1 parser 318: (dvoid *)&lobs.items[i].locator,
1.5 parser 319: (sword)sizeof (lobs.items[i].locator), SQLT_CLOB, (dvoid *)0,
320: (ub2 *)0, (ub2 *)0, (ub4)0, (ub4 *)0, OCI_DATA_AT_EXEC));
1.1 parser 321:
322: lobs.items[i].rows.count=0;
323: OracleSQL_query_lobs::cbf_context_struct cbf_context={
324: &services, &cs, &lobs.items[i].rows};
325: check(services, cs, "bind dynamic", OCIBindDynamic(
326: lobs.items[i].bind, cs.errhp,
327: (dvoid *) &cbf_context, cbf_no_data,
328: (dvoid *) &cbf_context, cbf_get_data));
329: }
330: }
331:
332: execute_prepared(services, cs,
333: statement, stmthp, lobs,
334: offset, limit, handlers);
335: }
336: cleanup: // no check call after this point!
337: {
338: for(int i=0; i<lobs.count; i++) {
339: /* free var locator */
1.10 parser 340: if(OCILobLocator *locator=lobs.items[i].locator)
341: OCIDescriptorFree((dvoid *)locator, (ub4)OCI_DTYPE_LOB);
1.1 parser 342:
1.10 parser 343: /* free rows descriptors */
344: OracleSQL_query_lobs::return_rows &rows=lobs.items[i].rows;
345: for(int r=0; r<rows.count; r++)
346: OCIDescriptorFree((dvoid *)rows.row[r].locator, (ub4)OCI_DTYPE_LOB);
1.1 parser 347: }
348: }
349: if(stmthp)
1.10 parser 350: OCIHandleFree((dvoid *)stmthp, (ub4)OCI_HTYPE_STMT);
1.1 parser 351:
352: if(failed)
353: services._throw(cs.error);
354: }
355:
356: private: // private funcs
357:
358: const char *preprocess_statement(SQL_Driver_services& services, OracleSQL_connection_struct &cs,
359: const char *astatement, OracleSQL_query_lobs &lobs) {
360: size_t statement_size=strlen(astatement);
361:
362: char *result=(char *)services.malloc(statement_size
363: +MAX_STRING // in case of short 'strings'
364: +11/* returning */+6/* into */+(MAX_LOB_NAME_LENGTH+2/*:, */)*2/*ret into*/*MAX_IN_LOBS
365: +1);
366: const char *o=astatement;
367:
368: // /**xxx**/'literal' -> EMPTY_CLOB_FUNC_CALL
369: char *n=result;
370: while(*o) {
371: if(
372: o[0]=='/' &&
373: o[1]=='*' &&
374: o[2]=='*') { // name start
375: o+=3;
376: const char *name_begin=o;
377: while(*o)
378: if(
379: o[0]=='*' &&
380: o[1]=='*' &&
381: o[2]=='/' &&
382: o[3]=='\'') { // name end
383: const char *name_end=o;
384: o+=4;
385: OracleSQL_query_lobs::Item &item=lobs.items[lobs.count++];
386: item.name_ptr=name_begin; item.name_size=name_end-name_begin;
387: item.data_ptr=(char *)services.malloc(statement_size/*max*/); item.data_size=0;
388:
389: const char *start=o;
390: bool escaped=false;
391: while(*o && !(o[0]=='\'' && o[1]!='\'' && !escaped)) {
392: escaped=*o=='\\' || (o[0]=='\'' && o[1]=='\'');
393: if(escaped) {
394: // write pending, skip "\" or "'"
395: if(size_t size=o-start) {
396: memcpy(item.data_ptr+item.data_size, start, size);
397: item.data_size+=size;
398: }
399: start=++o;
400: } else
401: o++;
402: }
403: if(size_t size=o-start) {
404: memcpy(item.data_ptr+item.data_size, start, size);
405: item.data_size+=size;
406: }
407: if(*o)
408: o++; // skip "'"
409:
410: n+=sprintf(n, EMPTY_CLOB_FUNC_CALL);
411: break;
412: } else
413: o++; // /**skip**/'xxx'
414: } else
415: *n++=*o++;
416: }
417: *n=0;
418:
419: if(lobs.count) {
420: int i;
421: n+=sprintf(n, " returning ");
422: for(i=0; i<lobs.count; i++) {
423: if(i)
424: *n++=',';
1.9 parser 425: n+=sprintf(n, "%.*s", lobs.items[i].name_size, lobs.items[i].name_ptr);
1.1 parser 426: /*memcpy(n, lobs.items[i].name_ptr, lobs.items[i].name_size);
427: n+=lobs.items[i].name_size;*/
428: }
429: n+=sprintf(n, " into ");
430: for(i=0; i<lobs.count; i++) {
431: if(i)
432: *n++='x';
1.9 parser 433: n+=sprintf(n, ":%.*s", lobs.items[i].name_size, lobs.items[i].name_ptr);
1.1 parser 434: /**n++=':';
435: memcpy(n, lobs.items[i].name_ptr, lobs.items[i].name_size);
436: n+=lobs.items[i].name_size;*/
437: }
438: }
439:
440: return result;
441: }
442:
443: void execute_prepared(
444: SQL_Driver_services& services, OracleSQL_connection_struct &cs,
445: const char *statement, OCIStmt *stmthp, OracleSQL_query_lobs &lobs,
446: unsigned long offset, unsigned long limit,
447: SQL_Driver_query_event_handlers& handlers) {
448:
1.13 parser 449: ub2 stmt_type=0; // UNKNOWN
1.1 parser 450: /*
451: //gpfs on sun. paf 000818
452: //Zanyway, this is needed before.
453: check(services, cs, "get stmt type", OCIAttrGet(
454: (dvoid *)stmthp, (ub4)OCI_HTYPE_STMT, (ub1 *)&stmt_type,
1.5 parser 455: (ub4 *)0, OCI_ATTR_STMT_TYPE, cs.errhp));
1.1 parser 456: */
457: if(strncasecmp(statement, "select", 6)==0)
458: stmt_type=OCI_STMT_SELECT;
1.3 parser 459: else if(strncasecmp(statement, "insert", 6)==0)
1.1 parser 460: stmt_type=OCI_STMT_INSERT;
1.3 parser 461: else if(strncasecmp(statement, "update", 6)==0)
1.1 parser 462: stmt_type=OCI_STMT_UPDATE;
463:
1.6 parser 464: sword status=OCIStmtExecute(cs.svchp, stmthp, cs.errhp,
1.10 parser 465: (ub4)stmt_type==OCI_STMT_SELECT?0:1, (ub4)0,
466: (OCISnapshot *)NULL,
467: (OCISnapshot *)NULL, (ub4)OCI_DEFAULT);
1.1 parser 468:
1.3 parser 469: if(status!=OCI_NO_DATA)
1.1 parser 470: check(services, cs, "execute", status);
471:
472: {
473: for(int i=0; i<lobs.count; i++)
474: if(ub4 bytes_to_write=lobs.items[i].data_size) {
475: OracleSQL_query_lobs::return_rows *rows=&lobs.items[i].rows;
476: for(int r=0; r<rows->count; r++) {
477: OCILobLocator *locator=rows->row[r].locator;
478: check(services, cs, "lobwrite", OCILobWrite (
479: cs.svchp, cs.errhp,
480: locator, &bytes_to_write, 1,
1.10 parser 481: (dvoid *)lobs.items[i].data_ptr, (ub4)bytes_to_write, OCI_ONE_PIECE,
1.5 parser 482: (dvoid *)0, 0, (ub2)0,
1.1 parser 483: (ub1) SQLCS_IMPLICIT));
484: }
485: }
486: }
487:
488: switch(stmt_type) {
489: case OCI_STMT_SELECT:
490: fetch_table(services, cs,
1.3 parser 491: stmthp, offset, limit,
1.1 parser 492: handlers);
493: break;
1.7 parser 494: default:
495: /*
1.1 parser 496: case OCI_STMT_INSERT:
497: case OCI_STMT_UPDATE:
1.7 parser 498: */
1.1 parser 499: break;
500: }
501: }
502:
503: void fetch_table(SQL_Driver_services& services, OracleSQL_connection_struct &cs,
1.3 parser 504: OCIStmt *stmthp, unsigned long offset, unsigned long limit,
1.1 parser 505: SQL_Driver_query_event_handlers& handlers) {
1.7 parser 506:
1.1 parser 507: OCIParam *mypard;
508: ub2 dtype;
509: text *col_name;
510:
511: struct {
512: ub2 type;
513: char *str;
514: OCILobLocator *var;
515: OCIDefine *def;
516: sb2 indicator;
1.4 parser 517: } cols[MAX_COLS]={0};
518: int column_count=0;
1.1 parser 519:
1.4 parser 520: bool failed=false;
521: jmp_buf saved_mark; memcpy(saved_mark, cs.mark, sizeof(jmp_buf));
522: if(setjmp(cs.mark)) {
523: failed=true;
524: goto cleanup;
1.7 parser 525: } else {
1.4 parser 526: // idea of preincrementing is that at error time all handles would free up
1.5 parser 527: while(++column_count<=MAX_COLS) {
1.4 parser 528: /* get next descriptor, if there is one */
529: if(OCIParamGet(stmthp, OCI_HTYPE_STMT, cs.errhp, (void **)&mypard,
530: (ub4) column_count)!=OCI_SUCCESS)
531: break;
532:
533: /* Retrieve the data type attribute */
534: check(services, cs, "get type", OCIAttrGet(
535: (dvoid*) mypard, (ub4)OCI_DTYPE_PARAM,
1.5 parser 536: (dvoid*) &dtype, (ub4 *)0, (ub4)OCI_ATTR_DATA_TYPE,
1.4 parser 537: (OCIError *)cs.errhp));
538:
539: /* Retrieve the column name attribute */
540: ub4 col_name_len;
541: check(services, cs, "get name", OCIAttrGet(
542: (dvoid*) mypard, (ub4)OCI_DTYPE_PARAM,
543: (dvoid**) &col_name, (ub4 *) &col_name_len, (ub4)OCI_ATTR_NAME,
544: (OCIError *)cs.errhp));
545:
1.1 parser 546: {
1.4 parser 547: size_t size=(size_t)col_name_len;
548: char *ptr=(char *)services.malloc(size);
549: tolower(ptr, (char *)col_name, size);
550: handlers.add_column(ptr, size);
551: }
552:
553: ub2 coerce_type=dtype;
554: sb4 size=0;
555: void *ptr;
556:
557: switch(dtype) {
558: case SQLT_CLOB:
559: {
560: check(services, cs, "alloc output var desc", OCIDescriptorAlloc(
561: (dvoid *)cs.envhp, (dvoid **)(ptr=&cols[column_count-1].var),
562: (ub4)OCI_DTYPE_LOB,
1.5 parser 563: 0, (dvoid **)0));
1.4 parser 564:
565: size=0;
566: break;
567: }
568: default:
569: coerce_type=SQLT_STR;
570: ptr=cols[column_count-1].str=(char *)services.malloc(MAX_OUT_STRING_LENGTH+1);
571: size=MAX_OUT_STRING_LENGTH;
1.1 parser 572: break;
573: }
1.4 parser 574:
575: cols[column_count-1].type=coerce_type;
576:
577: check(services, cs, "DefineByPos", OCIDefineByPos(
578: stmthp, &cols[column_count-1].def, cs.errhp,
579: column_count, (ub1 *) ptr, size,
580: coerce_type, (dvoid *) &cols[column_count-1].indicator,
1.5 parser 581: (ub2 *)0, (ub2 *)0, OCI_DEFAULT));
1.1 parser 582: }
1.4 parser 583:
584: handlers.before_rows();
585:
1.5 parser 586: for(unsigned long row=0; !limit||row<limit+offset; row++) {
587: sword status=OCIStmtFetch(stmthp, cs.errhp, (ub4)1, (ub4)OCI_FETCH_NEXT,
1.4 parser 588: (ub4)OCI_DEFAULT);
589: if(status!=OCI_SUCCESS) {
590: if(status!=OCI_NO_DATA)
591: check(services, cs, "fetch", status);
592: break;
593: }
594: if(row>=offset) {
595: handlers.add_row();
596: for(int i=0; i<column_count; i++) {
597: size_t size;
598: void *ptr;
599: if(cols[i].indicator) { // NULL?
600: size=0;
601: ptr=0;
1.6 parser 602: } else // not NULL
1.4 parser 603: switch(cols[i].type) {
604: case SQLT_CLOB:
605: {
606: ub4 amtp=4096000000UL;
607: ub4 offset=1;
608: ub4 loblen=0;
609: OCILobLocator *var=(OCILobLocator *)cols[i].var;
610: OCILobGetLength(cs.svchp, cs.errhp, var, &loblen);
611: if(loblen) {
612: size=(size_t)loblen;
613: ptr=services.malloc(size);
614: check(services, cs, "lobread", OCILobRead(cs.svchp, cs.errhp,
615: var, &amtp, offset, (dvoid *) ptr,
616: loblen, (dvoid *)0,
617: 0,
1.5 parser 618: (ub2)0, (ub1) SQLCS_IMPLICIT));
1.4 parser 619: }
620: break;
621: }
622: default:
1.6 parser 623: if(const char *str=cols[i].str) {
624: size=strlen(str);
625: ptr=services.malloc(size);
626: memcpy(ptr, str, size);
627: } else {
628: size=0;
629: ptr=0;
630: }
1.4 parser 631: break;
1.1 parser 632: }
1.4 parser 633: handlers.add_row_cell(ptr, size);
1.1 parser 634: }
635: }
636: }
637: }
638:
1.4 parser 639: cleanup: // no check call after this point!
1.3 parser 640: for(int i=0; i<column_count; i++) {
1.1 parser 641: switch(cols[i].type) {
642: case SQLT_CLOB:
643: /* free var locator */
1.4 parser 644: OCIDescriptorFree((dvoid *) cols[i].var, (ub4)OCI_DTYPE_LOB);
1.1 parser 645: break;
646: default:
647: break;
648: }
649: }
1.4 parser 650:
651: if(failed) // need rethrow?
1.5 parser 652: longjmp(saved_mark, 1);
1.1 parser 653: }
654:
655: private: // conn client library funcs
1.6 parser 656:
657: friend void check(
658: SQL_Driver_services& services, OracleSQL_connection_struct &cs,
659: const char *step, sword status);
660: friend sb4 cbf_get_data(dvoid *ctxp,
661: OCIBind *bindp,
662: ub4 iter, ub4 index,
663: dvoid **bufpp,
664: ub4 **alenp,
665: ub1 *piecep,
666: dvoid **indpp,
667: ub2 **rcodepp);
668:
669:
670: #define OCI_DECL(name, params) \
671: typedef sword (*t_OCI##name)params; t_OCI##name OCI##name
672:
673: OCI_DECL(Initialize, (ub4 mode, dvoid *ctxp,
674: dvoid * (*malocfp)(dvoid *ctxp, size_t size),
675: dvoid * (*ralocfp)(dvoid *ctxp, dvoid *memptr, size_t newsize),
676: void (*mfreefp)(dvoid *ctxp, dvoid *memptr) ));
677:
678: OCI_DECL(EnvInit, (OCIEnv **envp, ub4 mode,
679: size_t xtramem_sz, dvoid **usrmempp));
680:
681: OCI_DECL(AttrGet, (CONST dvoid *trgthndlp, ub4 trghndltyp,
682: dvoid *attributep, ub4 *sizep, ub4 attrtype,
683: OCIError *errhp));
684:
685: OCI_DECL(AttrSet, (dvoid *trgthndlp, ub4 trghndltyp, dvoid *attributep,
686: ub4 size, ub4 attrtype, OCIError *errhp));
687:
688: OCI_DECL(BindByPos, (OCIStmt *stmtp, OCIBind **bindp, OCIError *errhp,
689: ub4 position, dvoid *valuep, sb4 value_sz,
690: ub2 dty, dvoid *indp, ub2 *alenp, ub2 *rcodep,
691: ub4 maxarr_len, ub4 *curelep, ub4 mode));
692:
693: OCI_DECL(BindDynamic, (OCIBind *bindp, OCIError *errhp, dvoid *ictxp,
694: OCICallbackInBind icbfp, dvoid *octxp,
695: OCICallbackOutBind ocbfp));
696:
697: OCI_DECL(DefineByPos, (OCIStmt *stmtp, OCIDefine **defnp, OCIError *errhp,
698: ub4 position, dvoid *valuep, sb4 value_sz, ub2 dty,
699: dvoid *indp, ub2 *rlenp, ub2 *rcodep, ub4 mode));
700:
701: OCI_DECL(DescriptorAlloc, (CONST dvoid *parenth, dvoid **descpp,
702: CONST ub4 type, CONST size_t xtramem_sz,
703: dvoid **usrmempp));
704:
705: OCI_DECL(DescriptorFree, (dvoid *descp, CONST ub4 type));
706:
707:
708: OCI_DECL(ErrorGet, (dvoid *hndlp, ub4 recordno, OraText *sqlstate,
709: sb4 *errcodep, OraText *bufp, ub4 bufsiz, ub4 type));
710:
711: OCI_DECL(HandleAlloc, (CONST dvoid *parenth, dvoid **hndlpp, CONST ub4 type,
712: CONST size_t xtramem_sz, dvoid **usrmempp));
1.1 parser 713:
1.6 parser 714: OCI_DECL(HandleFree, (dvoid *hndlp, CONST ub4 type));
715:
716: OCI_DECL(LobGetLength, (OCISvcCtx *svchp, OCIError *errhp,
717: OCILobLocator *locp,
718: ub4 *lenp));
719:
720: OCI_DECL(LobRead, (OCISvcCtx *svchp, OCIError *errhp, OCILobLocator *locp,
721: ub4 *amtp, ub4 offset, dvoid *bufp, ub4 bufl,
722: dvoid *ctxp, sb4 (*cbfp)(dvoid *ctxp,
723: CONST dvoid *bufp,
724: ub4 len,
725: ub1 piece),
726: ub2 csid, ub1 csfrm));
727:
728: OCI_DECL(LobWrite, (OCISvcCtx *svchp, OCIError *errhp, OCILobLocator *locp,
729: ub4 *amtp, ub4 offset, dvoid *bufp, ub4 buflen,
730: ub1 piece, dvoid *ctxp,
731: sb4 (*cbfp)(dvoid *ctxp,
732: dvoid *bufp,
733: ub4 *len,
734: ub1 *piece),
735: ub2 csid, ub1 csfrm));
736:
737: OCI_DECL(ParamGet, (CONST dvoid *hndlp, ub4 htype, OCIError *errhp,
738: dvoid **parmdpp, ub4 pos));
739:
740: OCI_DECL(ServerAttach, (OCIServer *srvhp, OCIError *errhp,
741: CONST OraText *dblink, sb4 dblink_len, ub4 mode));
742:
743: OCI_DECL(ServerDetach, (OCIServer *srvhp, OCIError *errhp, ub4 mode));
744:
745: OCI_DECL(SessionBegin, (OCISvcCtx *svchp, OCIError *errhp, OCISession *usrhp,
746: ub4 credt, ub4 mode));
747:
748: OCI_DECL(SessionEnd, (OCISvcCtx *svchp, OCIError *errhp, OCISession *usrhp,
749: ub4 mode));
750:
751: OCI_DECL(StmtExecute, (OCISvcCtx *svchp, OCIStmt *stmtp, OCIError *errhp,
752: ub4 iters, ub4 rowoff, CONST OCISnapshot *snap_in,
753: OCISnapshot *snap_out, ub4 mode));
754:
755: OCI_DECL(StmtFetch, (OCIStmt *stmtp, OCIError *errhp, ub4 nrows,
756: ub2 orientation, ub4 mode));
757:
758: OCI_DECL(StmtPrepare, (OCIStmt *stmtp, OCIError *errhp, CONST OraText *stmt,
759: ub4 stmt_len, ub4 language, ub4 mode));
760:
761: OCI_DECL(TransCommit, (OCISvcCtx *svchp, OCIError *errhp, ub4 flags));
762:
763: OCI_DECL(TransRollback, (OCISvcCtx *svchp, OCIError *errhp, ub4 flags));
1.1 parser 764:
765: private: // conn client library funcs linking
766:
767: const char *dlink(const char *dlopen_file_spec) {
1.14 ! parser 768: if(lt_dlinit())
! 769: return lt_dlerror();
! 770:
! 771: lt_dlhandle handle=lt_dlopen(dlopen_file_spec);
! 772: //return "hren31";
1.1 parser 773: if(!handle)
1.14 ! parser 774: return lt_dlerror(); //"can not open the dynamic link module";
1.1 parser 775:
776: #define DSLINK(name, action) \
777: name=(t_##name)lt_dlsym(handle, #name); \
778: if(!name) \
779: action;
780:
1.14 ! parser 781: #define OCI_LINK(name) DSLINK(OCI##name, return "function OCI" #name " was not found")
1.1 parser 782:
1.14 ! parser 783: OCI_LINK(Initialize);
! 784: OCI_LINK(EnvInit);
! 785: OCI_LINK(AttrGet); OCI_LINK(AttrSet);
! 786: OCI_LINK(BindByPos); OCI_LINK(BindDynamic);
! 787: OCI_LINK(DefineByPos);
! 788: OCI_LINK(DescriptorAlloc); OCI_LINK(DescriptorFree);
! 789: OCI_LINK(ErrorGet);
! 790: OCI_LINK(HandleAlloc); OCI_LINK(HandleFree);
! 791: OCI_LINK(LobGetLength);
! 792: OCI_LINK(LobRead); OCI_LINK(LobWrite);
! 793: OCI_LINK(ParamGet);
! 794: OCI_LINK(ServerAttach); OCI_LINK(ServerDetach);
! 795: OCI_LINK(SessionBegin); OCI_LINK(SessionEnd);
! 796: OCI_LINK(StmtExecute); OCI_LINK(StmtFetch); OCI_LINK(StmtPrepare);
! 797: OCI_LINK(TransCommit); OCI_LINK(TransRollback);
1.1 parser 798:
799: return 0;
800: }
801:
1.6 parser 802: } *OracleSQL_driver;
1.1 parser 803:
804: void check(
805: SQL_Driver_services& services, OracleSQL_connection_struct &cs,
806: const char *step, sword status) {
807:
1.4 parser 808: const char *msg;
1.2 parser 809: char reason[MAX_STRING/2];
1.1 parser 810:
811: switch (status) {
812: case OCI_SUCCESS:
1.4 parser 813: return; // hurrah
1.1 parser 814: case OCI_ERROR:
815: {
1.4 parser 816: sb4 errcode;
1.10 parser 817: if(OracleSQL_driver->OCIErrorGet((dvoid *)cs.errhp, (ub4)1, (text *)NULL, &errcode,
818: (text *)reason, (ub4)sizeof(reason), OCI_HTYPE_ERROR)==OCI_SUCCESS)
1.4 parser 819: msg=reason;
820: else
821: msg="[can not get error description]";
1.8 parser 822: break;
1.1 parser 823: }
824: case OCI_SUCCESS_WITH_INFO:
1.4 parser 825: msg="SUCCESS_WITH_INFO"; break;
1.1 parser 826: case OCI_NEED_DATA:
1.4 parser 827: msg="NEED_DATA"; break;
1.1 parser 828: case OCI_NO_DATA:
1.4 parser 829: msg="NODATA"; break;
1.1 parser 830: case OCI_INVALID_HANDLE:
1.4 parser 831: msg="INVALID_HANDLE"; break;
1.1 parser 832: case OCI_STILL_EXECUTING:
1.4 parser 833: msg="STILL_EXECUTE"; break;
1.1 parser 834: case OCI_CONTINUE:
1.4 parser 835: msg="CONTINUE"; break;
836: default:
837: msg="unknown"; break;
1.2 parser 838: }
1.1 parser 839:
1.3 parser 840: snprintf(cs.error, sizeof(cs.error), "%s (%s, %d)",
841: msg, step, (int)status);
1.1 parser 842: longjmp(cs.mark, 1);
843: }
844:
845:
846: /* ----------------------------------------------------------------- */
847: /* Intbind callback that does not do any data input. */
848: /* ----------------------------------------------------------------- */
849: static sb4 cbf_no_data(
850: dvoid *ctxp,
851: OCIBind *bindp,
852: ub4 iter, ub4 index,
853: dvoid **bufpp,
854: ub4 *alenpp,
855: ub1 *piecep,
856: dvoid **indpp) {
1.5 parser 857: *bufpp=(dvoid *)0;
1.2 parser 858: *alenpp=0;
859: static sb2 null_ind=-1;
860: *indpp=(dvoid *) &null_ind;
861: *piecep=OCI_ONE_PIECE;
1.1 parser 862:
863: return OCI_CONTINUE;
864: }
865:
866: /* ----------------------------------------------------------------- */
867: /* Outbind callback for returning data. */
868: /* ----------------------------------------------------------------- */
869: static sb4 cbf_get_data(dvoid *ctxp,
870: OCIBind *bindp,
871: ub4 iter, ub4 index,
872: dvoid **bufpp,
873: ub4 **alenp,
874: ub1 *piecep,
875: dvoid **indpp,
876: ub2 **rcodepp) {
877: OracleSQL_query_lobs::cbf_context_struct &context=
878: *(OracleSQL_query_lobs::cbf_context_struct *)ctxp;
879:
1.3 parser 880: if(index==0) {
1.6 parser 881: static ub4 rows;
882: check(*context.services, *context.cs, "AttrGet cbf_get_data ROWS_RETURNED",
883: OracleSQL_driver->OCIAttrGet(
884: (CONST dvoid *) bindp, OCI_HTYPE_BIND, (dvoid *)&rows,
885: (ub4 *)sizeof(ub2), OCI_ATTR_ROWS_RETURNED, context.cs->errhp)) ;
1.2 parser 886: context.rows->count=(ub2)rows;
887: context.rows->row=(OracleSQL_query_lobs::return_rows::return_row *)
1.1 parser 888: context.services->malloc(sizeof(OracleSQL_query_lobs::return_rows::return_row)*rows);
889: }
890:
891: OracleSQL_query_lobs::return_rows::return_row &var=context.rows->row[index];
892:
1.6 parser 893: check(*context.services, *context.cs, "alloc output var desc dynamic", OracleSQL_driver->OCIDescriptorAlloc(
1.1 parser 894: (dvoid *) context.cs->envhp, (dvoid **)&var.locator,
1.3 parser 895: (ub4)OCI_DTYPE_LOB,
1.5 parser 896: 0, (dvoid **)0));
1.1 parser 897:
1.2 parser 898: *bufpp=var.locator;
899: *alenp=&var.len;
900: *indpp=(dvoid *) &var.ind;
901: *piecep=OCI_ONE_PIECE;
902: *rcodepp=&var.rcode;
1.1 parser 903:
904: return OCI_CONTINUE;
905: }
906:
1.3 parser 907: void tolower(char *out, const char *in, size_t size) {
908: while(size--)
909: *out++=tolower(*in++);
910: }
1.1 parser 911:
912: extern "C" SQL_Driver *create() {
1.10 parser 913: //_asm int 3;
1.6 parser 914: return OracleSQL_driver=new OracleSQL_Driver();
1.1 parser 915: }